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| 1 /* | |
| 2 * Copyright (C) 1998-2004 David Turner and Werner Lemberg | |
| 3 * Copyright (C) 2006 Behdad Esfahbod | |
| 4 * | |
| 5 * This is part of HarfBuzz, an OpenType Layout engine library. | |
| 6 * | |
| 7 * Permission is hereby granted, without written agreement and without | |
| 8 * license or royalty fees, to use, copy, modify, and distribute this | |
| 9 * software and its documentation for any purpose, provided that the | |
| 10 * above copyright notice and the following two paragraphs appear in | |
| 11 * all copies of this software. | |
| 12 * | |
| 13 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR | |
| 14 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES | |
| 15 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN | |
| 16 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH | |
| 17 * DAMAGE. | |
| 18 * | |
| 19 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, | |
| 20 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND | |
| 21 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS | |
| 22 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO | |
| 23 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. | |
| 24 */ | |
| 25 | |
| 26 #ifndef HARFBUZZ_GPOS_PRIVATE_H | |
| 27 #define HARFBUZZ_GPOS_PRIVATE_H | |
| 28 | |
| 29 #include "harfbuzz-impl.h" | |
| 30 #include "harfbuzz-stream-private.h" | |
| 31 #include "harfbuzz-gpos.h" | |
| 32 | |
| 33 HB_BEGIN_HEADER | |
| 34 | |
| 35 #ifdef HB_USE_PACKED_STRUCTS | |
| 36 #pragma pack(push, 1) | |
| 37 #endif | |
| 38 | |
| 39 /* shared tables */ | |
| 40 | |
| 41 #define VR_X_PLACEMENT_DEVICE 0 | |
| 42 #define VR_Y_PLACEMENT_DEVICE 1 | |
| 43 #define VR_X_ADVANCE_DEVICE 2 | |
| 44 #define VR_Y_ADVANCE_DEVICE 3 | |
| 45 | |
| 46 struct HB_ValueRecord_ | |
| 47 { | |
| 48 HB_Short XPlacement; /* horizontal adjustment for | |
| 49 placement */ | |
| 50 HB_Short YPlacement; /* vertical adjustment for | |
| 51 placement */ | |
| 52 HB_Short XAdvance; /* horizontal adjustment for | |
| 53 advance */ | |
| 54 HB_Short YAdvance; /* vertical adjustment for | |
| 55 advance */ | |
| 56 | |
| 57 HB_Device** DeviceTables; /* device tables for placement | |
| 58 and advance */ | |
| 59 | |
| 60 #ifdef HB_SUPPORT_MULTIPLE_MASTER | |
| 61 HB_UShort XIdPlacement; /* horizontal placement metric ID */ | |
| 62 HB_UShort YIdPlacement; /* vertical placement metric ID */ | |
| 63 HB_UShort XIdAdvance; /* horizontal advance metric ID */ | |
| 64 HB_UShort YIdAdvance; /* vertical advance metric ID */ | |
| 65 #endif | |
| 66 }; | |
| 67 | |
| 68 typedef struct HB_ValueRecord_ HB_ValueRecord; | |
| 69 | |
| 70 | |
| 71 /* Mask values to scan the value format of the ValueRecord structure. | |
| 72 We always expand compressed ValueRecords of the font. */ | |
| 73 | |
| 74 #define HB_GPOS_FORMAT_HAVE_DEVICE_TABLES 0x00F0 | |
| 75 | |
| 76 #define HB_GPOS_FORMAT_HAVE_X_PLACEMENT 0x0001 | |
| 77 #define HB_GPOS_FORMAT_HAVE_Y_PLACEMENT 0x0002 | |
| 78 #define HB_GPOS_FORMAT_HAVE_X_ADVANCE 0x0004 | |
| 79 #define HB_GPOS_FORMAT_HAVE_Y_ADVANCE 0x0008 | |
| 80 #define HB_GPOS_FORMAT_HAVE_X_PLACEMENT_DEVICE 0x0010 | |
| 81 #define HB_GPOS_FORMAT_HAVE_Y_PLACEMENT_DEVICE 0x0020 | |
| 82 #define HB_GPOS_FORMAT_HAVE_X_ADVANCE_DEVICE 0x0040 | |
| 83 #define HB_GPOS_FORMAT_HAVE_Y_ADVANCE_DEVICE 0x0080 | |
| 84 #define HB_GPOS_FORMAT_HAVE_X_ID_PLACEMENT 0x0100 | |
| 85 #define HB_GPOS_FORMAT_HAVE_Y_ID_PLACEMENT 0x0200 | |
| 86 #define HB_GPOS_FORMAT_HAVE_X_ID_ADVANCE 0x0400 | |
| 87 #define HB_GPOS_FORMAT_HAVE_Y_ID_ADVANCE 0x0800 | |
| 88 | |
| 89 | |
| 90 struct HB_AnchorFormat1_ | |
| 91 { | |
| 92 HB_Short XCoordinate; /* horizontal value */ | |
| 93 HB_Short YCoordinate; /* vertical value */ | |
| 94 }; | |
| 95 | |
| 96 typedef struct HB_AnchorFormat1_ HB_AnchorFormat1; | |
| 97 | |
| 98 | |
| 99 struct HB_AnchorFormat2_ | |
| 100 { | |
| 101 HB_Short XCoordinate; /* horizontal value */ | |
| 102 HB_Short YCoordinate; /* vertical value */ | |
| 103 HB_UShort AnchorPoint; /* index to glyph contour point */ | |
| 104 }; | |
| 105 | |
| 106 typedef struct HB_AnchorFormat2_ HB_AnchorFormat2; | |
| 107 | |
| 108 #define AF3_X_DEVICE_TABLE 0 | |
| 109 #define AF3_Y_DEVICE_TABLE 1 | |
| 110 | |
| 111 struct HB_AnchorFormat3_ | |
| 112 { | |
| 113 HB_Short XCoordinate; /* horizontal value */ | |
| 114 HB_Short YCoordinate; /* vertical value */ | |
| 115 HB_Device** DeviceTables; /* device tables for coordinates */ | |
| 116 }; | |
| 117 | |
| 118 typedef struct HB_AnchorFormat3_ HB_AnchorFormat3; | |
| 119 | |
| 120 | |
| 121 #ifdef HB_SUPPORT_MULTIPLE_MASTER | |
| 122 struct HB_AnchorFormat4_ | |
| 123 { | |
| 124 HB_UShort XIdAnchor; /* horizontal metric ID */ | |
| 125 HB_UShort YIdAnchor; /* vertical metric ID */ | |
| 126 }; | |
| 127 | |
| 128 typedef struct HB_AnchorFormat4_ HB_AnchorFormat4; | |
| 129 #endif | |
| 130 | |
| 131 | |
| 132 struct HB_Anchor_ | |
| 133 { | |
| 134 HB_Byte PosFormat; /* 1, 2, 3, or 4 -- 0 indicates | |
| 135 that there is no Anchor table */ | |
| 136 | |
| 137 union | |
| 138 { | |
| 139 HB_AnchorFormat1 af1; | |
| 140 HB_AnchorFormat2 af2; | |
| 141 HB_AnchorFormat3 af3; | |
| 142 #ifdef HB_SUPPORT_MULTIPLE_MASTER | |
| 143 HB_AnchorFormat4 af4; | |
| 144 #endif | |
| 145 } af; | |
| 146 }; | |
| 147 | |
| 148 typedef struct HB_Anchor_ HB_Anchor; | |
| 149 | |
| 150 | |
| 151 struct HB_MarkRecord_ | |
| 152 { | |
| 153 HB_UShort Class; /* mark class */ | |
| 154 HB_Anchor MarkAnchor; /* anchor table */ | |
| 155 }; | |
| 156 | |
| 157 typedef struct HB_MarkRecord_ HB_MarkRecord; | |
| 158 | |
| 159 | |
| 160 struct HB_MarkArray_ | |
| 161 { | |
| 162 HB_UShort MarkCount; /* number of MarkRecord tables */ | |
| 163 HB_MarkRecord* MarkRecord; /* array of MarkRecord tables */ | |
| 164 }; | |
| 165 | |
| 166 typedef struct HB_MarkArray_ HB_MarkArray; | |
| 167 | |
| 168 | |
| 169 /* LookupType 1 */ | |
| 170 | |
| 171 struct HB_SinglePosFormat1_ | |
| 172 { | |
| 173 HB_ValueRecord Value; /* ValueRecord for all covered | |
| 174 glyphs */ | |
| 175 }; | |
| 176 | |
| 177 typedef struct HB_SinglePosFormat1_ HB_SinglePosFormat1; | |
| 178 | |
| 179 | |
| 180 struct HB_SinglePosFormat2_ | |
| 181 { | |
| 182 HB_UShort ValueCount; /* number of ValueRecord tables */ | |
| 183 HB_ValueRecord* Value; /* array of ValueRecord tables */ | |
| 184 }; | |
| 185 | |
| 186 typedef struct HB_SinglePosFormat2_ HB_SinglePosFormat2; | |
| 187 | |
| 188 | |
| 189 struct HB_SinglePos_ | |
| 190 { | |
| 191 HB_Byte PosFormat; /* 1 or 2 */ | |
| 192 HB_Coverage Coverage; /* Coverage table */ | |
| 193 | |
| 194 HB_UShort ValueFormat; /* format of ValueRecord table */ | |
| 195 | |
| 196 union | |
| 197 { | |
| 198 HB_SinglePosFormat1 spf1; | |
| 199 HB_SinglePosFormat2 spf2; | |
| 200 } spf; | |
| 201 }; | |
| 202 | |
| 203 typedef struct HB_SinglePos_ HB_SinglePos; | |
| 204 | |
| 205 | |
| 206 /* LookupType 2 */ | |
| 207 | |
| 208 struct HB_PairValueRecord_ | |
| 209 { | |
| 210 HB_UShort SecondGlyph; /* glyph ID for second glyph */ | |
| 211 HB_ValueRecord Value1; /* pos. data for first glyph */ | |
| 212 HB_ValueRecord Value2; /* pos. data for second glyph */ | |
| 213 }; | |
| 214 | |
| 215 typedef struct HB_PairValueRecord_ HB_PairValueRecord; | |
| 216 | |
| 217 | |
| 218 struct HB_PairSet_ | |
| 219 { | |
| 220 HB_UShort PairValueCount; | |
| 221 /* number of PairValueRecord tables */ | |
| 222 HB_PairValueRecord* PairValueRecord; | |
| 223 /* array of PairValueRecord tables */ | |
| 224 }; | |
| 225 | |
| 226 typedef struct HB_PairSet_ HB_PairSet; | |
| 227 | |
| 228 | |
| 229 struct HB_PairPosFormat1_ | |
| 230 { | |
| 231 HB_UShort PairSetCount; /* number of PairSet tables */ | |
| 232 HB_PairSet* PairSet; /* array of PairSet tables */ | |
| 233 }; | |
| 234 | |
| 235 typedef struct HB_PairPosFormat1_ HB_PairPosFormat1; | |
| 236 | |
| 237 | |
| 238 struct HB_Class2Record_ | |
| 239 { | |
| 240 HB_ValueRecord Value1; /* pos. data for first glyph */ | |
| 241 HB_ValueRecord Value2; /* pos. data for second glyph */ | |
| 242 }; | |
| 243 | |
| 244 typedef struct HB_Class2Record_ HB_Class2Record; | |
| 245 | |
| 246 | |
| 247 struct HB_Class1Record_ | |
| 248 { | |
| 249 HB_Class2Record* Class2Record; /* array of Class2Record tables */ | |
| 250 }; | |
| 251 | |
| 252 typedef struct HB_Class1Record_ HB_Class1Record; | |
| 253 | |
| 254 | |
| 255 struct HB_PairPosFormat2_ | |
| 256 { | |
| 257 HB_ClassDefinition ClassDef1; /* class def. for first glyph */ | |
| 258 HB_ClassDefinition ClassDef2; /* class def. for second glyph */ | |
| 259 HB_UShort Class1Count; /* number of classes in ClassDef1 | |
| 260 table */ | |
| 261 HB_UShort Class2Count; /* number of classes in ClassDef2 | |
| 262 table */ | |
| 263 HB_Class1Record* Class1Record; /* array of Class1Record tables */ | |
| 264 }; | |
| 265 | |
| 266 typedef struct HB_PairPosFormat2_ HB_PairPosFormat2; | |
| 267 | |
| 268 | |
| 269 struct HB_PairPos_ | |
| 270 { | |
| 271 HB_Byte PosFormat; /* 1 or 2 */ | |
| 272 HB_Coverage Coverage; /* Coverage table */ | |
| 273 HB_UShort ValueFormat1; /* format of ValueRecord table | |
| 274 for first glyph */ | |
| 275 HB_UShort ValueFormat2; /* format of ValueRecord table | |
| 276 for second glyph */ | |
| 277 | |
| 278 union | |
| 279 { | |
| 280 HB_PairPosFormat1 ppf1; | |
| 281 HB_PairPosFormat2 ppf2; | |
| 282 } ppf; | |
| 283 }; | |
| 284 | |
| 285 typedef struct HB_PairPos_ HB_PairPos; | |
| 286 | |
| 287 | |
| 288 /* LookupType 3 */ | |
| 289 | |
| 290 struct HB_EntryExitRecord_ | |
| 291 { | |
| 292 HB_Anchor EntryAnchor; /* entry Anchor table */ | |
| 293 HB_Anchor ExitAnchor; /* exit Anchor table */ | |
| 294 }; | |
| 295 | |
| 296 | |
| 297 typedef struct HB_EntryExitRecord_ HB_EntryExitRecord; | |
| 298 | |
| 299 struct HB_CursivePos_ | |
| 300 { | |
| 301 HB_UShort PosFormat; /* always 1 */ | |
| 302 HB_Coverage Coverage; /* Coverage table */ | |
| 303 HB_UShort EntryExitCount; | |
| 304 /* number of EntryExitRecord tables */ | |
| 305 HB_EntryExitRecord* EntryExitRecord; | |
| 306 /* array of EntryExitRecord tables */ | |
| 307 }; | |
| 308 | |
| 309 typedef struct HB_CursivePos_ HB_CursivePos; | |
| 310 | |
| 311 | |
| 312 /* LookupType 4 */ | |
| 313 | |
| 314 struct HB_BaseRecord_ | |
| 315 { | |
| 316 HB_Anchor* BaseAnchor; /* array of base glyph anchor | |
| 317 tables */ | |
| 318 }; | |
| 319 | |
| 320 typedef struct HB_BaseRecord_ HB_BaseRecord; | |
| 321 | |
| 322 | |
| 323 struct HB_BaseArray_ | |
| 324 { | |
| 325 HB_UShort BaseCount; /* number of BaseRecord tables */ | |
| 326 HB_BaseRecord* BaseRecord; /* array of BaseRecord tables */ | |
| 327 }; | |
| 328 | |
| 329 typedef struct HB_BaseArray_ HB_BaseArray; | |
| 330 | |
| 331 | |
| 332 struct HB_MarkBasePos_ | |
| 333 { | |
| 334 HB_UShort PosFormat; /* always 1 */ | |
| 335 HB_Coverage MarkCoverage; /* mark glyph coverage table */ | |
| 336 HB_Coverage BaseCoverage; /* base glyph coverage table */ | |
| 337 HB_UShort ClassCount; /* number of mark classes */ | |
| 338 HB_MarkArray MarkArray; /* mark array table */ | |
| 339 HB_BaseArray BaseArray; /* base array table */ | |
| 340 }; | |
| 341 | |
| 342 typedef struct HB_MarkBasePos_ HB_MarkBasePos; | |
| 343 | |
| 344 | |
| 345 /* LookupType 5 */ | |
| 346 | |
| 347 struct HB_ComponentRecord_ | |
| 348 { | |
| 349 HB_Anchor* LigatureAnchor; /* array of ligature glyph anchor | |
| 350 tables */ | |
| 351 }; | |
| 352 | |
| 353 typedef struct HB_ComponentRecord_ HB_ComponentRecord; | |
| 354 | |
| 355 | |
| 356 struct HB_LigatureAttach_ | |
| 357 { | |
| 358 HB_UShort ComponentCount; | |
| 359 /* number of ComponentRecord tables */ | |
| 360 HB_ComponentRecord* ComponentRecord; | |
| 361 /* array of ComponentRecord tables */ | |
| 362 }; | |
| 363 | |
| 364 typedef struct HB_LigatureAttach_ HB_LigatureAttach; | |
| 365 | |
| 366 | |
| 367 struct HB_LigatureArray_ | |
| 368 { | |
| 369 HB_UShort LigatureCount; /* number of LigatureAttach tables */ | |
| 370 HB_LigatureAttach* LigatureAttach; | |
| 371 /* array of LigatureAttach tables */ | |
| 372 }; | |
| 373 | |
| 374 typedef struct HB_LigatureArray_ HB_LigatureArray; | |
| 375 | |
| 376 | |
| 377 struct HB_MarkLigPos_ | |
| 378 { | |
| 379 HB_UShort PosFormat; /* always 1 */ | |
| 380 HB_Coverage MarkCoverage; /* mark glyph coverage table */ | |
| 381 HB_Coverage LigatureCoverage; | |
| 382 /* ligature glyph coverage table */ | |
| 383 HB_UShort ClassCount; /* number of mark classes */ | |
| 384 HB_MarkArray MarkArray; /* mark array table */ | |
| 385 HB_LigatureArray LigatureArray; /* ligature array table */ | |
| 386 }; | |
| 387 | |
| 388 typedef struct HB_MarkLigPos_ HB_MarkLigPos; | |
| 389 | |
| 390 | |
| 391 /* LookupType 6 */ | |
| 392 | |
| 393 struct HB_Mark2Record_ | |
| 394 { | |
| 395 HB_Anchor* Mark2Anchor; /* array of mark glyph anchor | |
| 396 tables */ | |
| 397 }; | |
| 398 | |
| 399 typedef struct HB_Mark2Record_ HB_Mark2Record; | |
| 400 | |
| 401 | |
| 402 struct HB_Mark2Array_ | |
| 403 { | |
| 404 HB_UShort Mark2Count; /* number of Mark2Record tables */ | |
| 405 HB_Mark2Record* Mark2Record; /* array of Mark2Record tables */ | |
| 406 }; | |
| 407 | |
| 408 typedef struct HB_Mark2Array_ HB_Mark2Array; | |
| 409 | |
| 410 | |
| 411 struct HB_MarkMarkPos_ | |
| 412 { | |
| 413 HB_UShort PosFormat; /* always 1 */ | |
| 414 HB_Coverage Mark1Coverage; /* first mark glyph coverage table */ | |
| 415 HB_Coverage Mark2Coverage; /* second mark glyph coverave table */ | |
| 416 HB_UShort ClassCount; /* number of combining mark classes */ | |
| 417 HB_MarkArray Mark1Array; /* MarkArray table for first mark */ | |
| 418 HB_Mark2Array Mark2Array; /* MarkArray table for second mark */ | |
| 419 }; | |
| 420 | |
| 421 typedef struct HB_MarkMarkPos_ HB_MarkMarkPos; | |
| 422 | |
| 423 | |
| 424 /* needed by both lookup type 7 and 8 */ | |
| 425 | |
| 426 struct HB_PosLookupRecord_ | |
| 427 { | |
| 428 HB_UShort SequenceIndex; /* index into current | |
| 429 glyph sequence */ | |
| 430 HB_UShort LookupListIndex; /* Lookup to apply to that pos. */ | |
| 431 }; | |
| 432 | |
| 433 typedef struct HB_PosLookupRecord_ HB_PosLookupRecord; | |
| 434 | |
| 435 | |
| 436 /* LookupType 7 */ | |
| 437 | |
| 438 struct HB_PosRule_ | |
| 439 { | |
| 440 HB_UShort GlyphCount; /* total number of input glyphs */ | |
| 441 HB_UShort PosCount; /* number of PosLookupRecord tables */ | |
| 442 HB_UShort* Input; /* array of input glyph IDs */ | |
| 443 HB_PosLookupRecord* PosLookupRecord; | |
| 444 /* array of PosLookupRecord tables */ | |
| 445 }; | |
| 446 | |
| 447 typedef struct HB_PosRule_ HB_PosRule; | |
| 448 | |
| 449 | |
| 450 struct HB_PosRuleSet_ | |
| 451 { | |
| 452 HB_UShort PosRuleCount; /* number of PosRule tables */ | |
| 453 HB_PosRule* PosRule; /* array of PosRule tables */ | |
| 454 }; | |
| 455 | |
| 456 typedef struct HB_PosRuleSet_ HB_PosRuleSet; | |
| 457 | |
| 458 | |
| 459 struct HB_ContextPosFormat1_ | |
| 460 { | |
| 461 HB_Coverage Coverage; /* Coverage table */ | |
| 462 HB_UShort PosRuleSetCount; /* number of PosRuleSet tables */ | |
| 463 HB_PosRuleSet* PosRuleSet; /* array of PosRuleSet tables */ | |
| 464 }; | |
| 465 | |
| 466 typedef struct HB_ContextPosFormat1_ HB_ContextPosFormat1; | |
| 467 | |
| 468 | |
| 469 struct HB_PosClassRule_ | |
| 470 { | |
| 471 HB_UShort GlyphCount; /* total number of context classes */ | |
| 472 HB_UShort PosCount; /* number of PosLookupRecord tables */ | |
| 473 HB_UShort* Class; /* array of classes */ | |
| 474 HB_PosLookupRecord* PosLookupRecord; | |
| 475 /* array of PosLookupRecord tables */ | |
| 476 }; | |
| 477 | |
| 478 typedef struct HB_PosClassRule_ HB_PosClassRule; | |
| 479 | |
| 480 | |
| 481 struct HB_PosClassSet_ | |
| 482 { | |
| 483 HB_UShort PosClassRuleCount; | |
| 484 /* number of PosClassRule tables */ | |
| 485 HB_PosClassRule* PosClassRule; /* array of PosClassRule tables */ | |
| 486 }; | |
| 487 | |
| 488 typedef struct HB_PosClassSet_ HB_PosClassSet; | |
| 489 | |
| 490 | |
| 491 /* The `MaxContextLength' field is not defined in the TTO specification | |
| 492 but simplifies the implementation of this format. It holds the | |
| 493 maximal context length used in the context rules. */ | |
| 494 | |
| 495 struct HB_ContextPosFormat2_ | |
| 496 { | |
| 497 HB_UShort MaxContextLength; | |
| 498 /* maximal context length */ | |
| 499 HB_Coverage Coverage; /* Coverage table */ | |
| 500 HB_ClassDefinition ClassDef; /* ClassDef table */ | |
| 501 HB_UShort PosClassSetCount; | |
| 502 /* number of PosClassSet tables */ | |
| 503 HB_PosClassSet* PosClassSet; /* array of PosClassSet tables */ | |
| 504 }; | |
| 505 | |
| 506 typedef struct HB_ContextPosFormat2_ HB_ContextPosFormat2; | |
| 507 | |
| 508 | |
| 509 struct HB_ContextPosFormat3_ | |
| 510 { | |
| 511 HB_UShort GlyphCount; /* number of input glyphs */ | |
| 512 HB_UShort PosCount; /* number of PosLookupRecord tables */ | |
| 513 HB_Coverage* Coverage; /* array of Coverage tables */ | |
| 514 HB_PosLookupRecord* PosLookupRecord; | |
| 515 /* array of PosLookupRecord tables */ | |
| 516 }; | |
| 517 | |
| 518 typedef struct HB_ContextPosFormat3_ HB_ContextPosFormat3; | |
| 519 | |
| 520 | |
| 521 struct HB_ContextPos_ | |
| 522 { | |
| 523 HB_Byte PosFormat; /* 1, 2, or 3 */ | |
| 524 | |
| 525 union | |
| 526 { | |
| 527 HB_ContextPosFormat1 cpf1; | |
| 528 HB_ContextPosFormat2 cpf2; | |
| 529 HB_ContextPosFormat3 cpf3; | |
| 530 } cpf; | |
| 531 }; | |
| 532 | |
| 533 typedef struct HB_ContextPos_ HB_ContextPos; | |
| 534 | |
| 535 | |
| 536 /* LookupType 8 */ | |
| 537 | |
| 538 struct HB_ChainPosRule_ | |
| 539 { | |
| 540 HB_UShort* Backtrack; /* array of backtrack glyph IDs */ | |
| 541 HB_UShort* Input; /* array of input glyph IDs */ | |
| 542 HB_UShort* Lookahead; /* array of lookahead glyph IDs */ | |
| 543 HB_PosLookupRecord* PosLookupRecord; | |
| 544 /* array of PosLookupRecords */ | |
| 545 HB_UShort BacktrackGlyphCount; | |
| 546 /* total number of backtrack glyphs */ | |
| 547 HB_UShort InputGlyphCount; | |
| 548 /* total number of input glyphs */ | |
| 549 HB_UShort LookaheadGlyphCount; | |
| 550 /* total number of lookahead glyphs */ | |
| 551 HB_UShort PosCount; /* number of PosLookupRecords */ | |
| 552 }; | |
| 553 | |
| 554 typedef struct HB_ChainPosRule_ HB_ChainPosRule; | |
| 555 | |
| 556 | |
| 557 struct HB_ChainPosRuleSet_ | |
| 558 { | |
| 559 HB_UShort ChainPosRuleCount; | |
| 560 /* number of ChainPosRule tables */ | |
| 561 HB_ChainPosRule* ChainPosRule; /* array of ChainPosRule tables */ | |
| 562 }; | |
| 563 | |
| 564 typedef struct HB_ChainPosRuleSet_ HB_ChainPosRuleSet; | |
| 565 | |
| 566 | |
| 567 struct HB_ChainContextPosFormat1_ | |
| 568 { | |
| 569 HB_Coverage Coverage; /* Coverage table */ | |
| 570 HB_UShort ChainPosRuleSetCount; | |
| 571 /* number of ChainPosRuleSet tables */ | |
| 572 HB_ChainPosRuleSet* ChainPosRuleSet; | |
| 573 /* array of ChainPosRuleSet tables */ | |
| 574 }; | |
| 575 | |
| 576 typedef struct HB_ChainContextPosFormat1_ HB_ChainContextPosFormat1; | |
| 577 | |
| 578 | |
| 579 struct HB_ChainPosClassRule_ | |
| 580 { | |
| 581 HB_UShort* Backtrack; /* array of backtrack classes */ | |
| 582 HB_UShort* Input; /* array of context classes */ | |
| 583 HB_UShort* Lookahead; /* array of lookahead classes */ | |
| 584 HB_PosLookupRecord* PosLookupRecord; | |
| 585 /* array of substitution lookups */ | |
| 586 HB_UShort BacktrackGlyphCount; | |
| 587 /* total number of backtrack | |
| 588 classes */ | |
| 589 HB_UShort InputGlyphCount; | |
| 590 /* total number of context classes */ | |
| 591 HB_UShort LookaheadGlyphCount; | |
| 592 /* total number of lookahead | |
| 593 classes */ | |
| 594 HB_UShort PosCount; /* number of PosLookupRecords */ | |
| 595 }; | |
| 596 | |
| 597 typedef struct HB_ChainPosClassRule_ HB_ChainPosClassRule; | |
| 598 | |
| 599 | |
| 600 struct HB_ChainPosClassSet_ | |
| 601 { | |
| 602 HB_UShort ChainPosClassRuleCount; | |
| 603 /* number of ChainPosClassRule | |
| 604 tables */ | |
| 605 HB_ChainPosClassRule* ChainPosClassRule; | |
| 606 /* array of ChainPosClassRule | |
| 607 tables */ | |
| 608 }; | |
| 609 | |
| 610 typedef struct HB_ChainPosClassSet_ HB_ChainPosClassSet; | |
| 611 | |
| 612 | |
| 613 /* The `MaxXXXLength' fields are not defined in the TTO specification | |
| 614 but simplifies the implementation of this format. It holds the | |
| 615 maximal context length used in the specific context rules. */ | |
| 616 | |
| 617 struct HB_ChainContextPosFormat2_ | |
| 618 { | |
| 619 HB_Coverage Coverage; /* Coverage table */ | |
| 620 | |
| 621 HB_UShort MaxBacktrackLength; | |
| 622 /* maximal backtrack length */ | |
| 623 HB_ClassDefinition BacktrackClassDef; | |
| 624 /* BacktrackClassDef table */ | |
| 625 HB_UShort MaxInputLength; | |
| 626 /* maximal input length */ | |
| 627 HB_ClassDefinition InputClassDef; | |
| 628 /* InputClassDef table */ | |
| 629 HB_UShort MaxLookaheadLength; | |
| 630 /* maximal lookahead length */ | |
| 631 HB_ClassDefinition LookaheadClassDef; | |
| 632 /* LookaheadClassDef table */ | |
| 633 | |
| 634 HB_UShort ChainPosClassSetCount; | |
| 635 /* number of ChainPosClassSet | |
| 636 tables */ | |
| 637 HB_ChainPosClassSet* ChainPosClassSet; | |
| 638 /* array of ChainPosClassSet | |
| 639 tables */ | |
| 640 }; | |
| 641 | |
| 642 typedef struct HB_ChainContextPosFormat2_ HB_ChainContextPosFormat2; | |
| 643 | |
| 644 | |
| 645 struct HB_ChainContextPosFormat3_ | |
| 646 { | |
| 647 HB_UShort BacktrackGlyphCount; | |
| 648 /* number of backtrack glyphs */ | |
| 649 HB_Coverage* BacktrackCoverage; | |
| 650 /* array of backtrack Coverage | |
| 651 tables */ | |
| 652 HB_UShort InputGlyphCount; | |
| 653 /* number of input glyphs */ | |
| 654 HB_Coverage* InputCoverage; | |
| 655 /* array of input coverage | |
| 656 tables */ | |
| 657 HB_UShort LookaheadGlyphCount; | |
| 658 /* number of lookahead glyphs */ | |
| 659 HB_Coverage* LookaheadCoverage; | |
| 660 /* array of lookahead coverage | |
| 661 tables */ | |
| 662 HB_UShort PosCount; /* number of PosLookupRecords */ | |
| 663 HB_PosLookupRecord* PosLookupRecord; | |
| 664 /* array of substitution lookups */ | |
| 665 }; | |
| 666 | |
| 667 typedef struct HB_ChainContextPosFormat3_ HB_ChainContextPosFormat3; | |
| 668 | |
| 669 | |
| 670 struct HB_ChainContextPos_ | |
| 671 { | |
| 672 HB_Byte PosFormat; /* 1, 2, or 3 */ | |
| 673 | |
| 674 union | |
| 675 { | |
| 676 HB_ChainContextPosFormat1 ccpf1; | |
| 677 HB_ChainContextPosFormat2 ccpf2; | |
| 678 HB_ChainContextPosFormat3 ccpf3; | |
| 679 } ccpf; | |
| 680 }; | |
| 681 | |
| 682 typedef struct HB_ChainContextPos_ HB_ChainContextPos; | |
| 683 | |
| 684 | |
| 685 #if 0 | |
| 686 /* LookupType 10 */ | |
| 687 struct HB_ExtensionPos_ | |
| 688 { | |
| 689 HB_UShort PosFormat; /* always 1 */ | |
| 690 HB_UShort LookuptType; /* lookup-type of referenced subtable */ | |
| 691 HB_GPOS_SubTable *subtable; /* referenced subtable */ | |
| 692 }; | |
| 693 | |
| 694 typedef struct HB_ExtensionPos_ HB_ExtensionPos; | |
| 695 #endif | |
| 696 | |
| 697 | |
| 698 union HB_GPOS_SubTable_ | |
| 699 { | |
| 700 HB_SinglePos single; | |
| 701 HB_PairPos pair; | |
| 702 HB_CursivePos cursive; | |
| 703 HB_MarkBasePos markbase; | |
| 704 HB_MarkLigPos marklig; | |
| 705 HB_MarkMarkPos markmark; | |
| 706 HB_ContextPos context; | |
| 707 HB_ChainContextPos chain; | |
| 708 }; | |
| 709 | |
| 710 typedef union HB_GPOS_SubTable_ HB_GPOS_SubTable; | |
| 711 | |
| 712 | |
| 713 | |
| 714 HB_INTERNAL HB_Error | |
| 715 _HB_GPOS_Load_SubTable( HB_GPOS_SubTable* st, | |
| 716 HB_Stream stream, | |
| 717 HB_UShort lookup_type ); | |
| 718 | |
| 719 HB_INTERNAL void | |
| 720 _HB_GPOS_Free_SubTable( HB_GPOS_SubTable* st, | |
| 721 HB_UShort lookup_type ); | |
| 722 | |
| 723 #ifdef HB_USE_PACKED_STRUCTS | |
| 724 #pragma pack(pop) | |
| 725 #endif | |
| 726 | |
| 727 HB_END_HEADER | |
| 728 | |
| 729 #endif /* HARFBUZZ_GPOS_PRIVATE_H */ | |
| OLD | NEW |
|---|
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